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25 //
26 // G4ElasticHadrNucleusHe.hh
27
28 // The generator of high energy hadron-nucleus elastic scattering
29 // The hadron kinetic energy T > 1 GeV
30 // N.Starkov 2003.
31 //
32 // 19.11.05 The HE elastic scattering on proton is added (N.Starkov)
33 // 16.11.06 General redesign (N.Starkov)
34 // 23.11.06 General cleanup, ONQ0=3 (V.Ivanchenko)
35 // 15.05.07 Redesign and cleanup (V.Ivanchenko)
36 // 18.05.07 Cleanup (V.Grichine)
37 // 19.04.12 Fixed reproducibility violation (A.Ribon)
38 // 12.06.12 Fixed warnings of shadowed variables (A.Ribon)
39 //
40
41 #ifndef G4ElasticHadrNucleusHE_h
42 #define G4ElasticHadrNucleusHE_h 1
43
44 #include <vector>
45 #include <iostream>
46 #include <fstream>
47
48 #include "globals.hh"
49 #include "G4ParticleDefinition.hh"
50 #include "G4ParticleChange.hh"
51 #include "G4Nucleus.hh"
52 #include "G4HadronElastic.hh"
53 #include "G4Threading.hh"
54
55 class G4NistManager;
56
57 static const G4int NHADRONS = 26; // Number of allowed hadrons
58 static const G4int ONQ2 = 102; // Number of points on Q2
59 static const G4int NENERGY = 24;
60 static const G4int ZMAX = 93;
61
62 ///////////////////////////////////////////////////////////////////////
63
64 class G4ElasticData
65 {
66
67 friend class G4ElasticHadrNucleusHE;
68
69 public:
70
71 G4ElasticData(const G4ParticleDefinition* h, G4int Z, G4int A,
72 const G4double* e);
73
74 ~G4ElasticData() {}
75
76 private:
77
78 void DefineNucleusParameters(G4int A);
79
80 // hide assignment operator
81 G4ElasticData & operator=(const G4ElasticData &right);
82 G4ElasticData(const G4ElasticData&);
83
84 G4double R1, R2, Pnucl, Aeff;
85 G4double dQ2;
86 G4double massA;
87 G4double massA2;
88 G4double maxQ2[NENERGY];
89 std::vector<G4double> fCumProb[NENERGY];
90 };
91
92 /////////////////////////////////////////////////////////////////////
93
94 class G4ElasticHadrNucleusHE : public G4HadronElastic
95 {
96 public:
97
98 explicit G4ElasticHadrNucleusHE(const G4String& name = "hElasticGlauber");
99
100 ~G4ElasticHadrNucleusHE() override;
101
102 G4double SampleInvariantT(const G4ParticleDefinition* p, G4double plab,
103 G4int Z, G4int A) override;
104
105 void InitialiseModel() override;
106
107 void ModelDescription(std::ostream&) const override;
108
109 private:
110
111 G4double HadronNucleusQ2_2(const G4ElasticData *pElD, G4double plabGeV,
112 G4double tmax);
113
114 void DefineHadronValues(G4int Z);
115 G4int FillFq2(G4int A);
116
117 G4double GetLightFq2(G4int Z, G4int A, G4double Q);
118
119 G4double GetQ2_2(G4int N, G4int Nmax,
120 const std::vector<G4double>& F, G4double rand);
121
122 G4double HadrNucDifferCrSec(G4int A, G4double Q2);
123
124 void InterpolateHN(G4int n, const G4double EnP[],
125 const G4double C0P[], const G4double C1P[],
126 const G4double B0P[], const G4double B1P[]);
127
128 G4double GetFt(G4double Q2);
129
130 G4double HadronProtonQ2(G4double plab, G4double tmax);
131
132 void Binom();
133
134 void FillData(const G4ParticleDefinition* p, G4int idx, G4int Z);
135
136 void InFileName(std::ostringstream&, const G4ParticleDefinition* p, G4int Z);
137
138 void OutFileName(std::ostringstream&, const G4ParticleDefinition* p, G4int Z);
139
140 G4bool ReadLine(std::ifstream&, std::vector<G4double>&);
141
142 void WriteLine(std::ofstream&, std::vector<G4double>&);
143
144 inline G4double LineInterpol(G4double p0, G4double p2,
145 G4double c1, G4double c2, G4double p);
146
147 inline G4double GetBinomCof( G4int n, G4int m );
148
149 // hide assignment operator
150 G4ElasticHadrNucleusHE & operator=(const G4ElasticHadrNucleusHE &right);
151 G4ElasticHadrNucleusHE(const G4ElasticHadrNucleusHE&);
152
153 // fields
154 G4int iHadrCode;
155 G4int iHadron;
156 G4int iHadron1;
157 static const G4int fHadronCode[NHADRONS];
158 static const G4int fHadronType[NHADRONS];
159 static const G4int fHadronType1[NHADRONS];
160
161 static G4bool fStoreToFile;
162 static G4bool fRetrieveFromFile;
163
164 // momemtum limits
165 G4double ekinLowLimit;
166 G4double dQ2;
167
168 // projectile kinematics in GeV
169 G4double hMass;
170 G4double hMass2;
171 G4double hLabMomentum;
172 G4double hLabMomentum2;
173 G4double HadrEnergy;
174
175 // elastic parameters
176 G4double HadrTot, HadrSlope, HadrReIm, TotP;
177 G4double DDSect2, DDSect3, ConstU;
178
179 // momentum limits for different models of hadron/nucleon scatetring
180 G4double BoundaryP[7], BoundaryTL[7], BoundaryTG[7];
181
182 // parameterisation of scattering
183 G4double Slope1, Slope2, Coeff1, Coeff2;
184 G4double Slope0, Coeff0;
185
186 G4double aAIm, aDIm, Dtot11;
187
188 // nucleaus parameters
189 G4double R1, R2, Pnucl, Aeff, Q2max;
190
191 static G4double fLineF[ONQ2];
192 static G4double fEnergy[NENERGY];
193 static G4double fLowEdgeEnergy[NENERGY];
194 static G4double fBinom[240][240];
195
196 static G4ElasticData* fElasticData[NHADRONS][ZMAX];
197 G4NistManager* nistManager;
198 const char* fDirectory;
199
200 G4bool isMaster;
201
202 #ifdef G4MULTITHREADED
203 static G4Mutex elasticMutex;
204 #endif
205
206 };
207
208 ////////////////////////////////////////////////////////////////
209
210 inline
211 G4double G4ElasticHadrNucleusHE::LineInterpol(G4double p1, G4double p2,
212 G4double c1, G4double c2,
213 G4double p)
214 {
215 return c1+(p-p1)*(c2-c1)/(p2-p1);
216 }
217
218 ////////////////////////////////////////////////////////////////
219
220 inline
221 G4double G4ElasticHadrNucleusHE::GetBinomCof(G4int numN, G4int numM)
222 {
223 return (numN >= numM && numN < 240) ? fBinom[numN][numM] : 0.0;
224 }
225
226 ////////////////////////////////////////////////////////////////
227
228 #endif
229